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derred

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OK so I used Damon's strategy it is more likely to be the right way to do it because I got 112.5 and that's an answer choice. So is the formula (a*b)/c where a, b, and c are the three terms in order in the word problem?
I got a different problem: same words but 90 cm^3 with 25 degrees Celcius and what will it be when compressed to 20 cm^3. I figured out that the numbers are in relation to one another. So I figured out the answer is 6 because the number shrunk, 90 to 20 is
I did all of answers please thank me's answers, and I got 18 out of 23. Not surprised, seeing as the questions slightly change, but thank you for getting me a good score! For the other two questions, you can always search them up on this site as well
So basically, it's sonar waves being repelled off of another surface??

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